This gist helped me for to write this repo.
For use with your domain and SSL (lets encrypt) change name of the conf.d/void.example.com.conf and line 3 in the same file to your domin.
You can use it just with IP and just change line 3 of config file to your server IP.
# install it in Ubuntu 18.04 and later
sudo apt-get update
sudo apt-get install certbot
sudo apt-get install python3-certbot-nginx
# test and reload your config if you don't
sudo nginx -t && sudo nginx -s reload
# certbot -- Put your domain instead of void.example.com
sudo certbot --nginx -d void.example.com